Excavating-shovel.



H. B. SAU ERMAN.

EXCAVATING SHOVEL.

APPLICATION FILED APR. 15. l9l5- 1 ,QWJ 61;. Patented June 4, 1m.

2 SHEETS-SHEET l.

H. B. SAUERWIAN.

EXCAVATING SHOVEL. APPLICATION FILED APR. :5, 1915.

ifiw 1M 0 Patented June 4, 1918.

2 SHEETS-SHEET 2. 4.

, Wa ren S A E PA I- IENRY B SAUERMAN, orcrrrcneo, ILLINOIS.

orrion.

EXCAVATING-SHOVEL.

Specification of Letters ream.

Patented June 4, 1918 Application fi1ed Apri1 15, 1915. Serial No. 21,493.

To all whom 2'25 may concern: I I Be it known that I, HENRY B. SAnnRMAN, a citizen of the United States, residing at Chicago, in ,the county of Cook and State of Illinois, have invented certain new and useful Improvements in Excavating-Shovels, of which the following is a specification.

This invention relates to improvements in excavating shovels, and theprincipalobject of the invention isto provide a new and improved construction by which the swinging motion ofIthe shovel, while being moved, is reduced .to afininimum,and in whichlthe movement of the main hauling ropeis not given directly to the front of the shovel in raising in I I I Other objects will appear hereinafter. In the drawings :'I I I I I I I Figure 1 is aside elevation of an excavating device constructed in accordance with the principlesof my invention, I I Fig. 2 is a viewin elevationof the same, T Fig. 3 is'a view ofithe shovel in dumping position, 7 I I Fig. 4 is a view of a modified form which omits the drum-locking mechanism; IFig. 5 is'a rear, elevation of the shovel in Fig; 1; and Fig. 6 shows' a, shovel with a ,flexiblesupporting bail. I I I I I If the rope which raises the front of the shovel is connected direetlyby means of a pulley to the mainhauling rope, the moveme'nt of the main hauling rope causes a corresponding movement of the front of the shovel. This is obvious in asuspended type of shovel, for t-hereason that if the hauling rope gets to swinging, the movement is communicated. directly to thefront of the shovel, and asgmore or less swinging is bound to be present whenever the shovel is moved from one place to the other, or hauled in by the rope, it is diflicult to keep the: front of the shovel from thereby losing some of its contents. By placing a differential drum between the main hauling rope and the rope attached to the front of the ment is reduced to a minimum and by including a latch in connection with the drum, the front of the shovel can be raised to any desired height and held at that height without danger of the front of the shovel inclinin downwardly, rope oes become slack.

In the present invention, the numeral 6 designates generally a shovel. which is piv suitable distance above .ment that the rope inclining downwardly and shovel, this swinging movethe pawl in engagement with even if the hauling oted to a supporting bail 7 at a pointbehind the centerof gravity of the shovel. The shovel is formed with a forward cutting edge 8 and attached to the sides of the front of the shovel above the cutting edge, is a rope 9 forexerting a tal pull on the shovel. One or more holes 10 may be provided along the front of the shovel for changing the point of application of the horizontal pullingrope 9.

The bail 7 is preferably narrowed at a the shovel and has pivoted thereto drums 11 and 12 which are secured together, and which, for convenience,.may be termed a differential drum.

substantially horizon- I Secured to the front of the shovel are one I or more ropes 13 Which are adapted to be wound upon and-are secured to the drum 11.,of: smaller diameter. Secured to the larger drum 12 is a rope 14 the rotation of which causesa corresponling but reduced movement of the rope 13; I p 1 Both of the ropes 9 and 14 are secured toa main hauling rope-15, their relation being such that when theIshovel is in the position shown by 3, in which it is just about to be lowered into the material to be excavatecl,;the firstaction ofIthe main hauling rope will beto unwind the rope 1 1 from .itsdrum =12 which'will wind the rope 13 upon the drum 11 causing the shovel to be raised to the position shown in Fig. 1. At this time the slack will be taken out of the rope 9 and" the continuedpulling on the rope 15willI cause the haulingmovement of the shovel 6. From this it will be obvious that any movement which isgiven the rope 14; is reduced by the differential drum before it is transmitted to the shovel through the rope 13, and therefore any swinging move- 14 may have, will not be given directly to the front of the shovel.

Secured to the differential drum is a toothed ratchet wheel 16,=and pivoted to the bail 7 or a bracket 17 thereof, is a pawl 18 which has a weighted end tending to keep the ratchet wheel. hen the front of the shovel 6 is raised, under ordinary conditions, it is held against downward movement by the operation of the pawl and ratchet wheel.

This type of excavating shovel is frequently used in connection with an excavator boom 19 and the shovel is raised and lowered by means of a rope or cable 20 which passes over a whey 21 secured to the boom and another pulley 22 secured to the bail 7 The outer end of the rope 20 is usually secured toan eye -bolt' 23 at the end of the boom.

In order to release the pawl and ratchet dense the 21 20 is Provided with a we 'jection 24 and" the pawl carries a roller 25 which normally is in contact with the rope 20, but which, when the supporting bail 7 andtthe shovel 6 ,are raised sufliciently :by. the rope 20, will engage the projection-24:, causing the pawl ,to be withdrawntfrom Contact with (the ratchet wheel 16, thereby permitting the differential drum to beoperated in either direction for raising .or lowering the frontvoi' the shovel.

. lnrzthelformshown by Figs. l-and 5, the construction is the ,same as in the. other aligures with the exception that the pawl and ratchet are omitted:; the ropes 13 and letare Woundabout a diflerential drum, and in the absence of the pawl and ratchet, .thefhauling rope'15 must maintain a continuous'ten- .sion on one i or {the other of .the ropes 13: and '14 inuorder 1that:;the shovel will be properly (held inuperforminguits work. a If thelhauling: rope: is slackened, the shovel will .assume {the dotted line position shown in Fig. .4, thus discharging itsoontents.

. Although the word rope is used throughout the specification and claims, it isusedi in the-sense of anysuitable flexible member,

such: as a fibrouscord or rope, a chain,.or a wire rope or cable.

It is contemplated furthermore, that instead .of the rigid bail :7 a flexiblewbailwor suppontfF', asshownaby Fig. 6, may bezem- :ployedl in, connection with: the shovel .6 to whichnit is connected by means .of one. or more [brackets 26 at the rear .OEE IthGlShOVBl and supported by a :iastening 27 011 113116 support 17f. 'T'he brackets 26 beinguat the rear oifthe shovel ofienno resistance to its for.- ward movement, as they would if latuthe side.

What I claimds:

1; Iii-apparatus .of the class described, the combination with a support fiexiblymounted'for vertical reciprocation; a shovel pivoted at oneend to the support; means at.- tached to the other end for positively raising it, comprising aldifierential drum; and

latching meansucomprising a holding lever $091014?! lt himpotcnt may. she? obtained .1 1-

for the drum engaging by raising the support to disengage the shovel.

2*. In apparatusof the class described, the

combination with a support, of a ratchet drum having portions of two diameters pivoted therein, a shovel hinged at one end in said support, flexible means secured to the drum, other flexible means to rotate the drum in raising the end of the shovel, means to vertically elevate the support, and latch- IlIlg-lTlBiLl1S for engaging the drum ratchet which is automatically disengaged to release the raised .end of the shovel when thesupportis raised a predetermined amount.

3. Inapparatus of :the class described, the

combination with a suspended support, of a shovel" hinged at the rear from said support,

it. drum Shaving portions of two diameters rotatable in said support, flexible means attached to tlie front fof the shovel and to said drum, one" portion extending-from the shovel and around the drum 1 portion of smaller diameter, and another divided) and .otl1e1'\enc'l=,.ofithe shovel and wound upon the supportyflexihle .means attached to said drum 1 and shovel i to slowly and positively right the shovel and draw it laterally when the means :is pulled, and means for {holding the drum as the shovelis raised and until :thesupport is'ibodi'lyiraised'apredetermined amount whereupon [the drum is disengaged. In testimony whereofl have sign'ed my name-to this specification, jin' -the presence 1 of two subscribing witnesses, on this 13th day of April;v A. D. 19115.

HENLEY "B! SAUERMAN;

Witnesses:

1ENT WONNELL, ALLENA OFFU'IT.

w lnz i 1). 0-" y 

